Bad behaviour of captured vkEnumerateDeviceExtensionProperties

[qbojj]

In every extension layer in this repository captured vkEnumerateDeviceExtensionProperties advertise their extensions if pLayerName == NULL, but the spec states:

When pLayerName parameter is NULL, only extensions provided by the Vulkan implementation or by implicitly enabled layers are returned. When pLayerName is the name of a layer, the device extensions provided by that layer are returned.

[jeremyg-lunarg]

@charles-lunarg ISTR we discussed this at some point in the last few months and decided that these layers were doing what they needed. But I cannot find where. Do you remember?

[qbojj]

This issue was more of "is it intended behaviour on not" rather then "found an error", so if it is by-design that's fine with me.

[charles-lunarg]

The other discussion can be found here: KhronosGroup/Vulkan-Docs#2033